| 摘要 |
Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200 DEG C or greater However, by utilizing the catalyst system of the present invention polyesters can be synthesized at much lower temperatures. These catalyst systems are comprised of (1) at least one polymeric agent having pendant diphenyl phosphine dihalide groups, and (2) at least one acid acceptor. This invention specifically relates to a process for the synthesis of a polyester which is characterized by polymerizing at least one dicarboxylic acid with at least one aromatic glycol in the presence of (1) at least one polymeric agent having pendant diphenyl phosphine dihalide groups, and (2) at least one acid acceptor. |
